CN115207494A - Zinc ion battery electrolyte and application thereof - Google Patents

Zinc ion battery electrolyte and application thereof Download PDF

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Publication number
CN115207494A
CN115207494A CN202211009934.2A CN202211009934A CN115207494A CN 115207494 A CN115207494 A CN 115207494A CN 202211009934 A CN202211009934 A CN 202211009934A CN 115207494 A CN115207494 A CN 115207494A
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zinc
ion battery
electrolyte
zinc ion
manganese
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张易宁
林长新
陈素晶
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Fujian Institute of Research on the Structure of Matter of CAS
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/36—Accumulators not provided for in groups H01M10/05-H01M10/34
    • H01M10/38—Construction or manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/36—Accumulators not provided for in groups H01M10/05-H01M10/34
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00—Electrolytes
    • H01M2300/0002—Aqueous electrolytes
    • H01M2300/0014—Alkaline electrolytes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

The application discloses a zinc ion battery electrolyte and application thereof, wherein the zinc ion battery electrolyte comprises an electrolyte, a solvent and an additive; the additive is a nitrogen-containing compound. The symmetrical zinc ion battery and the zinc ion full battery assembled by using the zinc ion battery electrolyte have long cycle life. The zinc ion battery electrolyte is environment-friendly and economical, and the additive is less in addition amount, so that the zinc ion battery electrolyte has high practical application value.

Description

Zinc ion battery electrolyte and application thereof
Technical Field
The application relates to a zinc ion battery electrolyte and application thereof, belonging to the technical field of zinc-based batteries.
Background
The energy crisis and the problem of environmental pollution caused by the overuse of fossil fuels are among the most concern worldwide in the 21 st century. Lithium ion batteries have been widely used in the energy field of modern society as rechargeable energy storage devices with excellent performance. However, the development of lithium ion batteries has been limited due to high manufacturing costs and safety problems caused by the flammability of organic electrolytes.
Therefore, it is desired to develop a rechargeable battery that is safe, economical and eco-friendly. For this reason, batteries based on aqueous electrolytes are a promising option because aqueous electrolytes have inherent safety and environmental, economic advantages, as well as superior ion conductivity.
Among the numerous aqueous batteries, one of the most promising candidates is the zinc ion battery, which has unique advantages: a) Two electron oxidationThe reduction reaction and the low atomic mass of zinc provide a higher theoretical capacity (820 mAh g) -1 5854 Ah/L); b) The lower redox potential (-0.76V compared to Standard Hydrogen Electrode (SHE)) allows the zinc-ion battery to operate at higher voltages; c) The abundant global reserve of zinc and the non-toxic and harmless characteristics ensure the large-scale application prospect of the zinc. However, several key scientific issues surrounding zinc metal electrodes still hinder the development of zinc ion batteries, including poor Coulombic Efficiency (CE), byproducts of the cycling process, and the formation of zinc dendrites, among others. Since there is a highly reactive interface between the zinc and the electrolyte, there is zinc dendrite formation and growth at the interface and can lead to degradation of the cell performance due to side reactions, "dead" zinc and short circuit mechanisms. The stable interface between the zinc metal electrode and the electrolyte during cycling is considered critical for the preparation of long cycle life zinc ion batteries. Therefore, various strategies have been implemented to suppress dendritic formation on zinc metal electrodes, including the construction of protective layers, structural design of zinc anode materials, introduction of additives into the electrolyte, and the design of new electrolytes. However, the use of new electrolytes, such as "water-soluble salts" and ionic liquid systems, can add additional cost and their poor electrochemical reaction kinetics compared to aqueous electrolytes can adversely affect the rate performance of the cell. In addition, the coating scheme of the zinc anode has a problem in that the coating may be detached from the zinc anode during repeated cycles or prevent ion transfer. The nanostructured zinc electrode requires a complicated manufacturing process and severe side reactions occur at high potentials.
In practical applications, modifying the electrolyte with additives is the simplest, straightforward and economical compared to the other methods mentioned above. Electrolyte additives, e.g. MgSO 4 PEG200, polyacrylamide (PAM), diethyl ether, etc., have been used to inhibit zinc dendrites in Zinc Ion Battery (ZIBs) systems; the amount of these additives in the electrolyte is still quite large (more than 1 g/L).
Disclosure of Invention
The electrolyte is a novel electrolyte for the zinc ion battery, and the zinc ion battery using the electrolyte has long cycle life.
According to one aspect of the present application, there is provided a zinc ion battery electrolyte comprising an electrolyte, a solvent, and an additive; the additive is a nitrogen-containing compound.
Optionally, the nitrogen-containing compound is selected from at least one of dimethylamine, ethylenediamine, dimethylaminopropylamine, hydroxylamine hydrochloride, tetraethylpentamine, hexamethylenetetramine, N-vinylpyrrolidone, polyvinylpyrrolidone, polyethylenepolyamine.
Optionally, the mass concentration of the additive in the electrolyte of the zinc ion battery is 10ppm to 10000ppm.
Optionally, the mass concentration of the additive in the electrolyte of the zinc ion battery is selected from any value of 10ppm, 100ppm, 500ppm, 1000ppm, 5000ppm, 7000ppm, 10000ppm or a range value between any two points.
Optionally, the mass concentration of the additive in the electrolyte of the zinc ion battery is 100ppm to 500ppm.
Optionally, the electrolyte comprises at least a zinc compound, a base, and the solvent comprises at least water.
Optionally, the zinc compound is selected from at least one of zinc sulfate, zinc chloride, zinc nitrate, zinc triflate, zinc acetate.
Optionally, the base is selected from at least one of sodium hydroxide and potassium hydroxide. Optionally, in the electrolyte of the zinc ion battery, the molar concentration of zinc ions is 0.1mol/L to 5mol/L.
Optionally, the concentration of the zinc ion is selected from any value of 0.1mol/L, 1mol/L, 2mol/L, 3mol/L, 5mol/L or a range between any two of the above.
Optionally, the molar concentration of zinc ions is 1mol/L to 3mol/L.
Optionally, in the electrolyte of the zinc ion battery, the molar concentration of the alkali is 0.1mol/L to 10mol/L.
Optionally, in the electrolyte of the zinc ion battery, the molar concentration of the alkali is selected from any value of 0.1mol/L, 1mol/L, 2mol/L, 3mol/L, 5mol/L, 8mol/L and 10mol/L or a range value between any two points.
Optionally, the concentration of alkali in the electrolyte of the zinc ion battery is 1 mol/L-8 mol/L.
Optionally, the electrolyte further comprises a manganese compound.
Optionally, the manganese compound is selected from at least one of manganese sulfate, manganese chloride, manganese nitrate, manganese triflate.
Optionally, in the electrolyte of the zinc ion battery, the molar concentration of manganese ions is 0.01mol/L to 1mol/L.
Optionally, in the electrolyte of the zinc ion battery, the concentration of manganese ions is any value of 0.01mol/L, 0.05mol/L, 0.1mol/L, 0.2mol/L, 0.3mol/L, 0.5mol/L, 0.7mol/L, 1mol/L or a range value between any two of the above.
Optionally, in the electrolyte of the zinc ion battery, the concentration of manganese ions is 0.05mol/L to 0.5mol/L.
According to yet another aspect of the present application, there is provided a zinc ion battery comprising a positive electrode, a negative electrode and a separator for separating the positive electrode and the negative electrode, a zinc ion battery electrolyte being filled in a cavity between the positive electrode and the negative electrode; the zinc ion battery electrolyte is selected from the zinc ion battery electrolytes.
Optionally, the active material of the positive electrode is selected from at least one of a manganese compound, a vanadium compound, and a prussian blue compound.
Optionally, the manganese compound is selected from at least one of manganese monoxide, manganese dioxide, manganese sesquioxide, and manganese tetraoxide.
Optionally, the vanadium compound is selected from at least one of vanadium pentoxide, lithium vanadate, sodium vanadate, potassium vanadate, magnesium vanadate, calcium vanadate, and barium vanadate.
Optionally, the prussian blue compound is selected from iron hexacyanoferrate (Fe) 4 [Fe(CN) 6 ] 3 ) Zinc hexacyanoferrate (Zn) 2 [Fe(CN) 6 ] 3 ) Copper hexacyanoferrate (Cu) 2 [Fe(CN) 6 ] 3 ) At least one of (1).
Optionally, the active material of the negative electrode comprises at least zinc.
Optionally, the zinc is selected from at least one of zinc foil, zinc sheet, zinc foam, zinc powder, zinc rod.
Optionally, the separator is selected from at least one of glass fiber and polypropylene.
The beneficial effects that this application can produce include:
1) The electrolyte of the zinc ion battery is assembled into the symmetrical zinc ion battery, so that the circulating charge-discharge time is remarkably prolonged and can reach more than 800 h.
2) The zinc ion battery electrolyte is assembled into a zinc ion full battery, the cycle life is obviously prolonged and can reach more than 500 circles.
3) The zinc ion battery electrolyte is environment-friendly and economical, and has low additive amount and high practical application value.
Detailed Description
The present application will be described in detail with reference to examples, but the present application is not limited to these examples.
The raw materials in the examples of the present application were all purchased commercially, unless otherwise specified.
And (5) testing the performance of the battery by adopting a Xinwei battery tester.
Symmetrical zinc ion battery preparation
Two same zinc foils are used as electrodes, glass fiber is used as a diaphragm, and electrolyte is added to assemble the symmetrical zinc ion battery.
Example 1
Two same zinc foils are used as electrodes, glass fiber is used as a diaphragm, and electrolyte is added to assemble the symmetrical zinc ion battery. Wherein the electrolyte is 2mol/L zinc sulfate (ZnSO) 4 ) The aqueous solution contained 100ppm of ethylenediamine.
Example 2
Two same zinc foils are used as electrodes, glass fiber is used as a diaphragm, and electrolyte is added to assemble the symmetrical zinc ion battery. Wherein the electrolyte is 2mol/L zinc sulfate (ZnSO) 4 ) The aqueous solution contained 300ppm of ethylenediamine.
Example 3
Two identical zinc foils are used as electrodes, glass fiber is used as a diaphragm, and electrolyte is added to assemble the symmetrical zinc ion battery. Wherein the electrolyte is 2mol/L zinc sulfate (ZnSO) 4 ) The aqueous solution contained 500ppm of ethylenediamine.
Example 4
Two identical zinc foils are used as electrodes, glass fiber is used as a diaphragm, and electrolyte is added to assemble the symmetrical zinc ion battery. Wherein the electrolyte is 2mol/L zinc sulfate (ZnSO) 4 ) The aqueous solution contained 10ppm of ethylenediamine.
Example 5
Two identical zinc foils are used as electrodes, glass fiber is used as a diaphragm, and electrolyte is added to assemble the symmetrical zinc ion battery. Wherein the electrolyte is 2mol/L zinc sulfate (ZnSO) 4 ) The aqueous solution contained 500ppm tetraethylpentamine.
Example 6
Two same zinc foils are used as electrodes, glass fiber is used as a diaphragm, and electrolyte is added to assemble the symmetrical zinc ion battery. Wherein the electrolyte is 2mol/L zinc sulfate (ZnSO) 4 ) The aqueous solution contained 300ppm hexamethylenetetramine.
Example 7
Two same zinc foils are used as electrodes, glass fiber is used as a diaphragm, and electrolyte is added to assemble the symmetrical zinc ion battery. Wherein the electrolyte is 2mol/L zinc sulfate (ZnSO) 4 ) The aqueous solution contained 300 ppmN-vinylpyrrolidone.
Example 8
Two same zinc foils are used as electrodes, glass fiber is used as a diaphragm, and electrolyte is added to assemble the symmetrical zinc ion battery. Wherein the electrolyte is 2mol/L zinc sulfate (ZnSO) 4 ) The aqueous solution contained 300ppm polyvinylpyrrolidone.
Comparative example 1
Two identical zinc foils are used as electrodes, glass fiber is used as a diaphragm, and electrolyte is added to assemble the symmetrical zinc ion battery. Wherein the electrolyte is 2mol/L zinc sulfate (ZnSO) 4 ) An aqueous solution.
Testing of symmetric zinc ion batteries
Examples 1 to 8, the electrolyte of comparative example 1 was assembled into a symmetric zinc ion battery, and a constant current charge and discharge test was performed until the time of short circuit was a cyclic charge and discharge time, and a test current density was 1mAcm -2 The flour capacity is 1mAhcm -2 . The cycle charge and discharge times are shown in table 1.
TABLE 1 Cyclic Charge and discharge times for examples 1-8, comparative example 1
Figure BDA0003810346900000051
Figure BDA0003810346900000061
As shown in Table 1, the electrolyte in the comparative example 1 is assembled into the symmetrical zinc ion battery, the cycle charge-discharge time is 50h, and the electrolyte in the examples 2 to 8 is assembled into the symmetrical zinc ion battery, so that the cycle charge-discharge time is obviously improved and can reach 810h at most.
Example 9
Preparation of the positive electrode: preparing alpha-manganese dioxide, ketjen Black (Ketjen Black) and a binder (styrene butadiene rubber (SBR): carboxymethyl cellulose (CMC) = 2) into a positive electrode material by using deionized water as a solvent, wherein the weight ratio of the materials is 7:2:1 preparing electrode slurry; and coating the obtained electrode slurry on graphite paper, drying and cutting into pieces to obtain the manganese dioxide anode.
Assembling the whole battery: and sequentially arranging a manganese dioxide positive electrode, a glass fiber diaphragm and a zinc foil negative electrode, and adding an electrolyte to assemble the zinc ion full cell.
Wherein the electrolyte is 2mol/L zinc sulfate (ZnSO) 4 ) And 0.1mol/L manganese sulfate (MnSO) 4 ) The aqueous solution contained 100ppm of ethylenediamine.
Example 10
Preparation of the positive electrode: preparing alpha-manganese dioxide, ketjen Black (Ketjen Black) and a binder (styrene butadiene rubber (SBR): carboxymethyl cellulose (CMC) = 2) into a positive electrode material by using deionized water as a solvent, wherein the weight ratio of the materials is 7:2:1 preparing electrode slurry; and coating the obtained electrode slurry on graphite paper, drying and cutting into pieces to obtain the manganese dioxide anode.
Assembling the whole battery: and sequentially arranging a manganese dioxide positive electrode, a glass fiber diaphragm and a zinc foil negative electrode, and adding an electrolyte to assemble the zinc ion full cell.
Wherein the electrolyte is 2mol/L zinc sulfate (ZnSO) 4 ) And 0.1mol/L manganese sulfate (MnSO) 4 ) The aqueous solution contained 300ppm of ethylenediamine.
Example 11
Preparation of the positive electrode: preparing alpha-manganese dioxide, ketjen Black (Ketjen Black) and a binder (styrene butadiene rubber (SBR): carboxymethyl cellulose (CMC) = 2) into a positive electrode material by using deionized water as a solvent, wherein the weight ratio of the materials is 7:2:1 preparing electrode slurry; and coating the obtained electrode slurry on graphite paper, drying and cutting into pieces to obtain the manganese dioxide anode.
Assembling the whole battery: and sequentially arranging a manganese dioxide positive electrode, a glass fiber diaphragm and a zinc foil negative electrode, and adding an electrolyte to assemble the zinc ion full cell.
Wherein the electrolyte is 2mol/L zinc sulfate (ZnSO) 4 ) And 0.1mol/L manganese sulfate (MnSO) 4 ) The aqueous solution contained 500ppm of ethylenediamine.
Example 12
Preparation of the positive electrode: preparing alpha-manganese dioxide, ketjen Black (Ketjen Black) and a binder (styrene butadiene rubber (SBR): carboxymethyl cellulose (CMC) = 2) into a positive electrode material by using deionized water as a solvent, wherein the weight ratio of the materials is 7:2:1 preparing electrode slurry; and coating the obtained electrode slurry on graphite paper, drying and cutting into pieces to obtain the manganese dioxide anode.
Assembling the whole battery: and (3) sequentially arranging a manganese dioxide positive electrode, a glass fiber diaphragm and a zinc foil negative electrode, and adding an electrolyte to assemble the zinc ion full cell.
Wherein the electrolyte is 2mol/L zinc sulfate (ZnSO) 4 ) And 0.1mol/L manganese sulfate (MnSO) 4 ) The aqueous solution contained 100ppm of ethylenediamine.
Example 13
The difference from example 9 is that the electrolyte is 2mol/L zinc sulfate (ZnSO) 4 ) And 0.1mol/L manganese sulfate (MnSO) 4 ) The aqueous solution contained 300ppm tetraethylpentamine.
Example 14
The difference from example 9 is that the electrolyte is 2mol/L zinc sulfate (ZnSO) 4 ) And 0.1mol/L manganese sulfate (MnSO) 4 ) The aqueous solution contained 300ppm hexamethylenetetramine.
Example 15
The difference from example 9 is that the electrolyte is 2mol/L zinc sulfate (ZnSO) 4 ) And 0.1mol/L manganese sulfate (MnSO) 4 ) The aqueous solution contained 300ppm of N-vinylpyrrolidone.
Example 16
The difference from example 9 is that the electrolyte is 2mol/L zinc sulfate (ZnSO) 4 ) And 0.1mol/L manganese sulfate (MnSO) 4 ) The aqueous solution contained 300ppm polyvinylpyrrolidone.
Comparative example 2:
the difference from example 9 is that the electrolyte is 2mol/L zinc sulfate (ZnSO) 4 ) And 0.1mol/L manganese sulfate (MnSO) 4 ) The procedure of example 9 was repeated except that the aqueous solution was used.
Testing of Zinc ion full cells
Constant current charge and discharge experiments were carried out on the zinc ion full cells of examples 9 to 16 and comparative example 2 at a current density of 600mA g -1 (the mass of the anode material is taken as a reference), the voltage range of charging is 0.8V-1.80V, and the voltage range of discharging is 1.80V-0.8V. The number of cycles is shown in Table 2.
TABLE 2 number of charge and discharge cycles of examples 9 to 16 and comparative example 2
Examples of the present invention Number of times of cyclic charge and discharge (circle)
Example 9 480
Example 10 505
Example 11 480
Example 12 425
Example 13 485
Example 14 490
Example 15 495
Example 16 505
Comparative example 2 155
As can be seen from Table 2, the cycle life of the zinc ion full cell assembled by the electrolytes of examples 9 to 16 is remarkably improved compared with that of comparative example 2, and can reach more than 500 circles at most.
Example 17
The difference from example 9 is that the electrolyte solution was a 1mol/L aqueous solution of sodium hydroxide (NaOH) containing 300ppm of polyvinylpyrrolidone. The number of cycles of charge and discharge of the zinc ion full cell was equivalent to that of example 9.
Example 18
Preparation of the positive electrode: vanadium pentoxide, ketjen Black (Ketjen Black) and a binder (styrene butadiene rubber (SBR): carboxymethyl cellulose (CMC) = 3) were prepared into a positive electrode material with deionized water as a solvent in a weight ratio of 7:2:1 preparing electrode slurry; and coating the obtained electrode slurry on graphite paper, drying and cutting into pieces to obtain the vanadium pentoxide anode.
Assembling the whole battery: sequentially arranging vanadium pentoxide positive electrode and glass fiber as diaphragm and zinc foil negative electrode, adding electrolyte to assemble zinc ion full cell
Wherein the electrolyte is 2mol/L zinc triflate (Zn (CF) 3 SO 3 ) 2 ) The aqueous solution contained 300ppm polyvinylpyrrolidone.
Example 19
Preparation of the positive electrode: mixing Prussian blue hexacyanoferrate (Fe) 4 [Fe(CN) 6 ] 3 ) Ketjen Black (Ketjen Black) and a binder (styrene butadiene rubber (SBR): carboxymethyl cellulose (CMC) = 3) and deionized water is used as a solvent to prepare a positive electrode material, wherein the weight ratio of the positive electrode material to the deionized water is 7:2:1 preparing electrode slurry; coating the obtained electrode slurry on graphite paper, drying, and cutting into pieces to obtain Prussian blue (Fe) 4 [Fe(CN) 6 ] 3 ) And (4) a positive electrode.
Assembling the whole battery: mixing Prussian blue hexacyanoferrate (Fe) 4 [Fe(CN) 6 ] 3 ) The positive electrode and the glass fiber are used as a diaphragm and a zinc foil negative electrode which are sequentially arranged, and the electrolyte is added to assemble the zinc ion full cell.
Wherein the electrolyte is 1mol/L zinc acetate (Zn (Ac) 2 ) The aqueous solution contained 300ppm polyvinylpyrrolidone.
Example 20
Assembling the whole battery: and (3) arranging the foamed nickel anode and the glass fiber serving as the diaphragm and the zinc foil cathode in sequence, and adding electrolyte to assemble the zinc ion full cell.
Wherein the electrolyte is 1mol/L potassium hydroxide (KOH) aqueous solution containing 300ppm of ethylenediamine.
The cycle life of the zinc ion full cell of examples 17-20 was 400-500 cycles.
Although the present application has been described with reference to a few embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application as defined by the appended claims.

Claims (10)

1. The zinc ion battery electrolyte is characterized by comprising an electrolyte, a solvent and an additive; the additive is a nitrogen-containing compound.
2. The zinc ion battery electrolyte of claim 1, wherein the nitrogen-containing compound is selected from at least one of dimethylamine, ethylenediamine, dimethylaminopropylamine, hydroxylamine hydrochloride, tetraethylpentamine, hexamethylenetetramine, N-vinylpyrrolidone, polyvinylpyrrolidone, and polyethylenepolyamine.
3. The zinc ion battery electrolyte of claim 1, wherein the mass concentration of the additive in the zinc ion battery electrolyte is 10ppm to 10000ppm;
preferably, the mass concentration of the additive in the electrolyte of the zinc ion battery is 100ppm to 500ppm.
4. The zinc ion battery electrolyte of claim 1, wherein the electrolyte comprises at least a zinc compound, a base, and the solvent comprises at least water;
preferably, the zinc compound is selected from at least one of zinc sulfate, zinc chloride, zinc nitrate, zinc triflate and zinc acetate;
preferably, the alkali is at least one selected from sodium hydroxide and potassium hydroxide.
5. The zinc ion battery electrolyte according to claim 4, wherein the molar concentration of zinc ions in the zinc ion battery electrolyte is 0.1 to 5mol/L;
preferably, the molar concentration of zinc ions in the zinc ion battery electrolyte is 1 mol/L-3 mol/L.
6. The zinc ion battery electrolyte of claim 4, wherein the molar concentration of alkali in the zinc ion battery electrolyte is 0.1 to 10mol/L;
preferably, the molar concentration of the alkali in the electrolyte of the zinc ion battery is 1 mol/L-8 mol/L.
7. The zinc ion battery electrolyte of claim 1, further comprising a manganese compound;
preferably, the manganese compound is selected from at least one of manganese sulfate, manganese chloride, manganese nitrate and manganese triflate;
preferably, in the electrolyte of the zinc ion battery, the molar concentration of manganese ions is 0.01-1 mol/L;
preferably, the concentration of manganese ions in the electrolyte of the zinc ion battery is 0.05 mol/L-0.5 mol/L.
8. The zinc ion battery is characterized by comprising a positive electrode, a negative electrode and a diaphragm for separating the positive electrode and the negative electrode, wherein a cavity between the positive electrode and the negative electrode is filled with a zinc ion battery electrolyte;
the zinc ion battery electrolyte is selected from the zinc ion battery electrolytes described in any one of claims 1 to 7.
9. The zinc-ion battery according to claim 8, wherein the active material of the positive electrode is at least one selected from the group consisting of a manganese compound, a vanadium compound, and a prussian blue compound;
preferably, the manganese compound is selected from at least one of manganese monoxide, manganese dioxide, manganese sesquioxide and manganese tetraoxide;
preferably, the vanadium compound is selected from at least one of vanadium pentoxide, lithium vanadate, sodium vanadate, potassium vanadate, magnesium vanadate, calcium vanadate and barium vanadate;
preferably, the prussian blue compound is at least one selected from iron hexacyanoferrate, zinc hexacyanoferrate and copper hexacyanoferrate.
10. The zinc-ion battery according to claim 8, wherein the active material of the negative electrode contains at least zinc;
preferably, the zinc is selected from at least one of zinc foil, zinc sheet, zinc foam, zinc powder and zinc rod;
preferably, the separator is selected from at least one of glass fiber and polypropylene.
CN202211009934.2A 2022-08-23 2022-08-23 Zinc ion battery electrolyte and application thereof Pending CN115207494A (en)

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